Agent Browser Shield: Free OpenClaw Extension Blocks Prompt Injection & Dark Patterns
PixieBrix has released Agent Browser Shield, a free, source-available browser extension that sits between OpenClaw and the browser to protect AI agents from adversarial content.
What It Blocks
- Prompt injection — both visible and hidden instructions embedded in page content
- Dark patterns — UI elements designed to manipulate or coerce agent behavior
- Context pollution — low-value junk that degrades instruction following
Bonus: stripping irrelevant content reduces token consumption, making runs both more secure and cheaper.
Background
PixieBrix previously built insider-risk and social-engineering protection for BPO contact centers. Agent Browser Shield applies the same methodology to agentic browsing via OpenClaw.
The team acknowledges this is not a solved problem and is building the shield in the open, sharing benchmarks as they go. They invite community contributions to help prioritize rules.
Installation
Install alongside your OpenClaw setup from either:
- ClawHub: https://clawhub.ai/pixiebrix/agent-browser-shield
- GitHub: https://github.com/pixiebrix/agent-browser-shield
Give it a star and report weird agent behaviors you've encountered to help shape the ruleset.
📖 Read the full source: r/openclaw
👀 See Also
Cowork vs. Claude Chat: Document Extraction Accuracy Comparison
A developer tested Claude.ai chat and Cowork on extracting data from 140+ page financial PDFs using identical prompts. Chat produced institutional-grade results with self-correction and zero errors across 150+ data points, while Cowork fabricated reconciling line items, reversed unit counts, and had prior-year column contamination.
Four ClawHub Skills for Real-Time Search Data in AI Agents
Four ClawHub skills provide structured search capabilities for AI agents: Google (web, news, images, maps), Amazon (product search across 12 marketplaces), Walmart (product search with delivery filters), and YouTube (video search with transcripts). Install via clawhub install commands with one API key.
Council: A Structured Dialogue Framework for Claude
Council — A Crucible is a structured dialogue framework that runs inside a single Claude context window, using persona framing to produce four distinct modes of engagement: rigorous interrogation, generative action, lived experience, and unformed intuition.
Banker Creates Credit Due Diligence Tool with 31 AI Prompts Using Only Claude
A banker with 17 years of MSME credit underwriting experience in India has open-sourced 31 AI prompts that transform a visiting card into a full credit due diligence report, compressing a 3-4 week process to 30 minutes. The tool was built entirely through conversation with Claude, without writing any code.